Remove stems, wash and halve the green chiles.
Peel and crush the garlic pods.
Remove ends, half and peel the skin of the plantain.
Chop them into small cubes and boil them in water along with turmeric powder and salt until thoroughly cooked.
Once the plantain cubes turn soft, cool them down and mash them thoroughly.

Heat a tsp of oil in a small pan, add coriander seeds, cumin seeds, crushed garlic and green chiles.
Roast them for few seconds and remove from heat.
Grind them into fine paste adding little water.